Sewing-machine



J. P. WEIS.

SEWING MACHINE.

APPLICATION FILED JULY 20,1918.

Patented Jan.-l3, 1920.

2 SHEETS-SHEET I.

"JIN VEN TOIS. John P-WeLs.

TTORN S.

J. P. WEIS.

SEWING MACHINE.

APFLICATlON FILED JULY 20. 1918.

1,328, 108, Patented Jan. 13, 1920 2 SHEETSSHEET 2.

INVEN TIOR.

UNITED STATES rarnn orrron JOHN P. WEIS, OF NYACK, NEW YORK, ASSIGNOR 'I'O METROPOLITAN SEWING MACHINE CORPORATION, A CORPORATION OF DELAWARE. V

SEWING-MACHINE.

Specification of Letters Patent. Patented Jan. 13, 192

Application filed July'20, 1918. Serial No. 245,823.

To all whom it may concern: Be it known that I, J OH'N'P. VVEIs', a c1t'1- zen of the United States, residing at N-yac'k, in the county of Rockland and State of New York, have invented certain new and useful Improvements in Sewing-Machine's, of which the following is a specification.

This invention relates to sewing machines and comprises an improved mechanism for laying a cross threadon top of the work and which cross thread is stitched down by a pair of needles for the purpose of making covered seams or joining pieces of goods, the

' object of the invention being to provide an improved mechanism for laying the top cross thread in the path of the needles to be stitched down by the needle threads and to be of such adesign asto not interfere with the hands of the operator in the handling of the work and in general to be out of the we One-of the advantages of the presentim- 'provement is that the mechanism is simple,

consisting of a few parts arranged so as to give a rotary motion to the thread carrying finger around the needles. Themotion of the finger being so arranged as to not interfere in any way with the conducting of the needle threads-to the needles. hat is to say the finger oscillates in a circular path around the needles with the needle bar as thecenter, the finger being shaped spirally so that the movement of the main portion of the finger carrier willosoil'llate from one side around in back to the other side around in front of the needle bar and the needles in such a=way so as not to interfere or strike the needle threads or obstruct the line of vision. for threading the needles. In nearly all machines of this character. is it necessary to turn the machine to some given position to get the thread carrier out of the way of the needles for the purpose of threading. Such is not the case with the present improvement on account of the main move ment thereof being entirely inthe rear of the needles, whereas in former constructions the thread carriers passed .in front of the needles so as to contact with the needle threads.

Another advantage resides in the manner tain such rise and fall movement by means ofthe rack and pinion gear connection with the vertically oscillating shaft carried in the head of the machine, which in turn is connected with the presser foot mechanism for rise and'fall movement.

Another advantage is in the arrangement of the top finger thread guide, which may be adjustably secured to the presser foot shank having a universal adjustment, as well as an other form shown, carried by the frame of the machine and capable of vertical rise and fall movement, because of its connection with the presser foot mechanism. I

Another-advantage resides in the factthat the connections for operating the top thread carrying finger are located near the top of the machine frame leaving a clear place underneath the arm thereof for free manipulation of the work. 1

In the drawings accompanying and forming a partof this specification, Figure l is a front end view of so much of a sewing machine as is necessary to illustrate the inr provements; Fig. 2 is a perspective view of the thread carrying finger, thread guide, prcsser foot and needle mechanism. This view also shows a portion of work which has been stitched; Fig. 3 is a detail view showing the manner in which the finger cot-acts with the thread guide and theneedles in the formation of the stitch; Fig. 4 a view similar to 3, showing another position of the finger with relation to the needles in the formation of the stitch; Fig. 5 is another detail view showing the relation of thethread' carrying finger, thread guide and needles in the formation of the stitch; Fig. 6 isa detail top plan view showing a portion of the presser foot, thread guide, thread finger and the needles in the formation of the stitch. In this view the finger has reached near the extreme of its movement to the left in rear of the needles and shows-how the left hand needle steps into the. loop carried by the thread finger; Fig. 7 is a fragmentary detail of the needle thread take-up, showing the looper and the needles cooperating ther with; Fig. 8 is a view similar to F i 7 showing the take-up in another position so as to draw up the outside needle loop immediately as it is cast from the point of the looper so as to make a tight stitch; and Fig. 9 is a perspective view illustrating a different man-- ner of attaching the thread guide.

Similar characters of reference indicate corresponding parts in the several figures of the drawings.

In the drawings the bed plate 1 of the machine, and the cloth plate 2 thereof form a part of the machine frame of the wellknown Metropolitan construction having the usual hand wheel and needle lever 3,

which is operated into and out of the needle' loops and also from the front to rear of the needles, in the usual manner, so as to make the regular 2-needle 3-thread ornamental stitch on the bottom of the work.

The main or bottom shaft 13- of the machine is mounted in the usual bearings and the machine is equipped with the ordinary feed mechanism generally indicated by 14. The main shaft near the rear bearing earries a gear 15 in mesh with a gear 16. This last gear is mounted on a shaft 17 which is parallel with themain shaft and carried by the rear of the frame. A crank ball stud 18 is secured to the gear 16 and to a part 19, which has a rod 20 connected therewith, the other end of which carries a part 21 operating on a ball 22 secured to one end 23 of the bell crank lever 24. This lever 24 oscillates on the rear end 25 of the needle lever stud 4, and this stud is provided with a lock nut and an anti-friction collar 26. The arm 27 of the bell crank lever 24 carries a ball stud and part 28 having connected therewith the rod 29'. The other end of this rod carries a ball part 30 which is secured to the lever 31. This lever 31 is provided with a hub 32 operating between the bearings 32 of a yoke 32 which yoke is connected with the presser bar at 32 for movement therewith, and this lever 31 is secured to the rock shaft 33, which rocks in the bearings 34 and 35 of the machine frame.

Secured to this vertical rock shaft 33 below the bearing 35 is a hub 36 of the segmental gear 37 which has teeth along its curved face 38, and provided with top and bottom plates 39. The teeth 38 are in mesh with the teeth of a pinion 40. The top and bottom plates overlap the top and bottom walls of the pinion teeth so as to control the vertical rise and fall movement of the whole. The pinion gear is integral with the sleeve 41 which surrounds the needle bar 5 and operates in the bearing 6 in a rotary oscillating manner. This sleeve 41 projects from the bottom of the bearing 6 sufficiently to have clamped thereon a split collar 42 which is secured by a clamp screw 43, passing through the split portion 44. This collar terminate in a downward projection portion 45, slotted as at 46 and having a thread edend so as to receive a nut 47 which forms a clamping means for holding the thread carrying finger 48. This finger is bent in a spiral shape'so as to partly project around the needles. The bottom end thereof is 7 notched as at 49in asuitable manner to pick up and carry the thread around the needles in the formation of the stitches.

Cooperating with the thread carrying finger is a thread guide 50, which conducts the ornamental cross thread 51 in the path of the thread carrying finger (see Fig. 2). This thread guide is located at one side of the needles, which are arranged in a plane at right angles to the line of feed, and s slightly in the rear of said needles, so that in the operation of the thread carrying finger said finger moves in a circular path from a point in the rear of the needles around in front of the needles sufficiently to carry a loop of the cross thread 51 into such position that the needle farthest removed from the thread guide can enter such loop. 1 While I havefshown the thread guide located adjacent to the right hand needle the machine from which the drawings were made may be operated when so adjusted so as to have these conditions reversed. That is to say, the thread guide may be located adjacent the left hand needle and by revers ing the timing of the movements of the thread carrying finger the operations, thereof will be in reverse direction, and when so ar ranged will produce substantially the same stitch formation as when the parts are ar- 10.3 ranged as shown.

I have shown two forms of mounting the thread guide, one secured to the presser foot shank and the other to the machine frame.

The presser foot mechanism comprises a presser bar 52,'which operates in the bearings and is under spring tension asusual and has secured at the bottom end thereof the presser foot shank 53 (see Figs. 1 and 2). This shank has attached to its rear wall an angle bracket 54, carrying holes 55 tapped therein for the purpose of attaching thereto the shank 56 of the thread guide 50, which may he slotted as at 57 to permit, suitable adjustment up and down and in and out. The other form of thread guide (see Fig. 9) is arranged so as to be carried by the hub 58of the machine frame. A gib 59 is secured to the front wall of the hub and has one of its edges beveled, and a slot is milled into the hub vertically and parallel with they needle bar so as to form a dovetail groove 60 to receive a dovetail slide 61. This slide carries an attached plate 62 provided with a forked end 63 so as to co-act with the pin bular (strip.

.igeearos portion .64 carried by the presserflba'r, so as to give vertical rise and fall movement to the thread guide.

While I have: shown two forms of thread guides each having a verticalmovementwith the 'presser foot mechanism, I do not wish to be limitedto such construction as with the mechanism shown the-needles risesufliciently above the presser foot and the thread handling end 49 of the thread carrying finger 48- alsooperates sufficiently above the presser foot to perform their functions While the presser foot is co-acting with the feed in its rise and fall movements to feed the work in a proper-manner even when it is crossing seams. f

In most machines for doing. this character of work it is necessary to have a thread carrying finger almost rub the top surface of the presser foot and in that instance it is essential :to have a finger and thread guide rise and fall with the foot so as not todamage the same when crossing seams of when removing. or inserting the work. The

. presser' foot shank 53 has an enlarged portion provided with slots to receive the vertical outside portions 66 of the foot 67. These sections are spring depressed by springs 68 secured to the presserfoot shank and having their opposite ends resting on pi-ns69 to give downward pressure. to the outside sections 67 The middle section 70 of the foot is integral with the portion 65'of the foot and has the usual needle opening 71 for the pair of needles and which has a short tongue over which the stitches are formed. Fig. 2gshows the manner in which the work 72 is fed into the machine and guided by the lip 73 of the guide plate 74. The other part of- .the work is in this instance a tubular strip 7 5 such as is used for finishing the tops of ladies vests around the neck and arm-hole'openings, or lace or em broidery maybe stitched in place of a -tu- The stitch is represented at 76,. Fig. "2, it being understood thatthe bottom covering stitch isof the well known twin needle "threethread :Variety. The tubular strip passes underneath the overhanging portion 77 of the guide plate 74. This guide plate is mounted .on a swing bracket" .78 attached to the slide plate 7 9 by a shoulder screw'80'.

The-class of worksthis type of machine is used for .often requiresthe needles to beset close :to one another, usually one-eighth of an inch, so as to produce a narrow zseam. There has always been di'fliculty in controlling the formation of the stitches when the needle gage is narrow because the left hand needle-being set lower "than the other, the tendency is for it to deflect a larger loop and as the looper is entering'the'needle loops the left "hand loop frequently twists so "as .to cross over the loop formed by the other neecue. The result is animperfect stitch formation. Then again it is more diflicult to draw up a tight stitch on the left hand needle than it is on the right andto overcome these difliculties, I have provided a simple take-up. This comprises a'bracket 81 attached to the top bearing 7 of-the machine frame and it is adjustable'in two directions. The bracket has a vertical extension '82, having an inclinededge 83 and aninc'l'i ned edge 84.- The former co-acts with the eyelet 8 so as to draw the needle thread 85 to the position-shown in Fig. 8 indicated'by 86 because this thread extends from one wall 87 ofthe eyelet '8 to the other wall 88 so asto take up the loop 89 as it slips from the looper 11 in the formation of thestitch, when the needles are descending. The thread co-acting with the inclined edge 84 in the upward movement of the needles drawing the thread out to the position 90 shownin Fig. 7,-drawsthe thread so as to take up the outside needle loop indlcated by 91, making. the loop just large enough for the looper 11 to enter P pe ly- The adjustment of the vertical extension 8 2 which may be termed the take-up is arranged so that the amount of thread taken up by itcan be regulated. By changing its vertical position the time at which it takes up the thread may be changed. The operation or handling of the needle threads is as follows:

The two needle threads pass from the ordinary tensions (not shown) to the" stationary eyelet 92 and thence to the needle lever eyelet 93 and thence to the eyelets-in the wall 87, the left hand thread then passes to the eyelet in the wall 88 and then directly to the eye of the needle, while the 1-1 ht hand needle thread passes from the w-a'l '87 directly to the needle. Fromithe foregoing it will "be clear that the take-up 182 merely handles the outside or left hand needle thread. l The cross thread 51 of the thread finger 50 is under the tension control 50 and this tenslon is opened by a wire "50 carried by the presserbar 52 to release the thread when the bar is lifted for removal of the work. An eyelet 50 attached to the head at 50 conducts said 't'hreadto the guide50.

It is obvious that the details maybe more or less changed without; departing from the spirit or scope of the present improvement.

I claim as my invention: I

1. The combination of a worksupporuia presser foot, a presser bar carrying s aid'fo'ot, a feeding mechanism, a needle "bar, a pairof needles carried by said needle bar and ar ranged in a plane at right angles to the line of feed, a thread guide dis )osed at one side of the needles and" slightly in the rear of the plane of the needles, a thread hook movable across the line of feed to engage a cross thread extending through said thread guide andback across the line of feed for forming a loop in the cross thread, said hook and thread guide being so disposed relatively to the needles asvto position the loop in the cross-thread for .the entrance only of the needle farthest removed from the thread guide, means surrounding the needle bar for supporting said thread hook, and means for operating said supporting means.

The combination of a work support, a presser foot, a presser bar carrying said foot, a feeding mechanism, a needle bar, a pair of needles carried by said needle bar and arranged in a plane at right angles to the line of feed, a thread 'uide disposed at one side of the needles and slightly in the rear of the plane of the needles, a thread hook movable across the line of feedto engage cross thread extending through said thread guide and back across the line of feed for forming a loop in the cross thread, said hook and thread guide being so disposed relatively to the needles as to position the loop in the cross thread for theentrance only of the needle farthest removed from the thread guide, means surrounding the needle bar for supporting said threadhook, means for operating said supporting means, and take-up means for taking up the thread of one needle to a greater extent than that of the other.

In a sewing machine, the combination of stitching mechanism comprising a pair of needles, looper mechanism cooperating with the needles, a cross thread guide, and a single cross thread carrying a finger cooperating with the pair of needles and movable in a circular path practically around the'path of the needles, said finger having a spiral formation. 7

7 4. In a sewing machine, the combination of stitching mechanism comprising a pair of needles, looper mechanism cooperating with the needles, a presser toot, a cross thread guide movable with the presser foot, and a single cross thread carrying finger cooperating with the pair of needles and movable in a circular path practically around the path of the needles, said finger having a spiral formation.-

5. In a sewing machine, the combination of stitching mechanism comprising a plurality of needles, looper mechanism cooperating with the needles, and a single thread carrying finger cooperating with the needles and movable in a circular path practically around the path of the needles and comprising a spirally formed finger.

6. In a sewing machine, the combination of stitching mechanism comprising a needle bar carrying a pair of needles, looper mechanism cooperating with the needles, and a single cross thread pick up finger cooperating' with the needles and having its pivotal axis coincident with the axis of the needle bar and movable in a circular path practically around the path of the needles.

.7; In a sewing machine, the'combination of stitching mechanism comprising a: needle bar carrying a pair :of needles, looper mechanism cooperating with the needles, and a single cross thread carrying. finger cooperating with the needles and having its pivotal axis coincident with the axis of the needle bar and movable in a circular path practically around the path of the needles, said finger having a spiral formation.

8. In a sewing machine, the combination of stitching mechanism comprising a needle bar carrying a pair of needles, looper mechanism cooperating with the needles, a single cross thread carrying finger coiiperating with the needles and having its pivotal axis coincident with the axis of the needle bar and movable in a circular path practically around the path of the needles, said finger having a spiral formation, and a thread guide located to one side and. slightly in the rear of the needles. I

- 9. In a sewing machine, the combination of stitching mechanism comprising a needle bar carrying a pair of needles, looper mechanism cooperating with the needles, a single cross thread carrying finger co operating with the needles and having its pivotal axis coincident with the axis of the needle bar and movable in a circular path practically around the path of the needles, said finger having a spiral formation, presser toot mechanism, and a thread guide carried by said presser foot mechamsm.

10. In a sewing machine, the combination of stitching mechanism comprising a needle bar carrying a pair of needles, looper mechanism coiiperating with the needles, a single cross thread carrying finger cooperating with the needles and having its pivotal axis coincident with the axis of the needle bar and movable in a circular path practically around the path of the needles, said finger having a spiral formation, presser foot mechanism, and a thread guide carried by said presser foot mechanism and located to one side and slightly in the rear of the needles.

11.. In a sewing machine, the combination of stitching mechanism comprising a needle bar carrying a pair of needles, looper mechanism cooperating with the needles, a vertically supported rock shaft, means for rocking said shaft, a rack connected with said rock shaft, and a cross thread pick up finger having a part encircling said needle bar and having a gear cooperating with said rack.

12. In a sewing machine, the combination of stitching mechanism comprising a circling said needle bar and having a gear cooperating with said rack, said finger having a spiral formation. I

I 13. In a sewing machine, the combination of stitching mechanism comprising a needle bar carrying a pair of needles, looper mechanism cooperating with the needles, a: vertically supported rock shaft, means for rocking said shaft, a rack connected with said rock shaft, a cross thread pick up finger having a part encircling said needle bar and having a gear cooperating with said rack, and a thread guide cooperating with said finger.

14. In a sewing machine, the combination of stitching mechanism comprising a needle bar carrying a: pair of needles, looper mechanism cooperating with the needles, a vertically supported rock shaft, means for rockingsaid shaft, arack connected with said rock shaft, a cross thread carrying finger having a part encircling said needle bar and having a gear cooperating with said rack, and presser foot mechanism, said presser foot mechanism having connection with said rack and gear whereby the cross thread finger is raised and lowered with the presser foot mechanism.

'15. In a sewing machine, the combination of stitching mechanism comprising a needle bar carrying a pair of needles, looper mechanism cooperating with the needles, a vertically supported rock shaft, means for rock ing said shaft, a rack connected with said rock shaft, a cross thread carrying finger having a part encircling said needle'bar and having a gear cooperating with said rack,-

and presser foot mechanism, said presser foot mechanism having'connection with said rack and gear whereby the cross thread finger is raised and lowered with the presser foot mechanism and a thread guide carried by the presser foot mechanism to one side and slightly to the rear of the needles.

16. In a sewing machine, the combination of stitching mechanism comprising a needle bar carrying a pair of needles, looper mechanism cooperating with the needles, a vertically supported rock shaft, means for rocking said shaft, a rack connected with said rock shaft, a cross thread carrying finger having a part encircling said needle bar and having a gear cooperating with said rack, presser foot mechanism, said presser foot mechanism having connection with said rack and gear whereby the cross thread finger is raised and lowered with the presser foot mechanism and a thread guide carried by the presser foot mechanism to one side and slightly to the rearofthe'needles,and takeup means-effective to take tiptheslack of one needle thread to a greater extent than that of the other whereby :both needle stitches will beof uniform formation,

17. Inasewing machine, the combination of stitching mechanism comprising a needle bar carrying a pairof-needles, looper mechanism cooperating with r the needles, a spirally formed cross'thread carryin'g'finger cooperating with the needles, and take up means for taking up the thread of oneneedleto agreater extent than that of theother. 18.- In a sewing machine, the combination of stitching mechanism comprising a pair of needles, a: needle bar carrying said needles, looper mechanism cooperating with the needles, a cross thread guide, a single crossthread carrying finger cooperating with the pair of needles and having its pivotal axis substantially coincident with the axisof the needle bar and'mo-va blein a circular path practically around the path of the needles, and take up means effective to take formation, and take up means effective to take up the slack of one needle thread to a greater extent than that of the other whereby -both needle stitches willbe of uniform formation. i

20. In asewing machine, the combination of stitching mechanism comprising a pair of needles, a needle bar carrying said needles, looper mechanism cooperating with the needles, a presser foot, a cross threadguide movable with the presser foot, asin-c gle cross thread carrying finger cooperating with the- .pair of needles and"having 'its' pivotal axis substantially coincident with the axis of the needle bar and movable in a circular path practically around the path of the needles, and take up means effective to take up the slack of one needle thread to a greater extent than that of the other whereby both needle stitches will be of 1111iform formation.

21. In a sewing machine, thecombination of stitching mechanism comprising a plurality of needles, a needle bar carrying said needles, looper mechanism cooperating with the needles, thread carrying finger mechanism cooperating with the needles and having its pivotal axis substantially coincident with the axis of the needle bar and movable in a circular path practically around the form formation.

22. In a sewing machine, the combination of stltching mechanism comprising a needle bar carrying a palr of needles, looper 4 mechanism cooperating with the needles, a

cross thread pick-up finger cooperating with the needles and having its pivotal axis coincident with the "axis of the" needle bar and'movable in a circular path practically around the path of the needles, and take up means effective to take up the slack of one needle thread to a greater extent than that of the otherwhereby both needle stitches will be of uniform formation.

23; The combination of a work support, a presser foot, a presser bar carrying said foot, feedingmechanism, a needle bar, a pair of needles carried thereby and arranged in a plane'at right angles to-the-line of feed, a thread guide disposed at one side of the needles and slightly in the rear of the plane of the needles, a thread hook movable across the line of feed to engage the cross thread extending through said thread guide and back across the line of feed for forming a loop in the cross thread, and means surrounding the needle bar and supporting the thread hook whereby said' hook has its pivotal axis coincident with the axis of the needle bar, said hook and thread guide being so disposed relatively to the needles as to position the'loopin the cross thread for the entrance only of the needle farthest removed from the thread guide, means connecting said thread hook with the presser foot bar, and take up means for taking up thethread of one needle to a greater extent than that of the other. 7

In a sewing machine, the combination of presser foot mechanism, feeding mechanism, a pair of needles, a thread guide disposed at one side of the needles and slightly in the rear of the plane of the needles, a cross thread carrying finger cooperating with the.

25. In a sewingmachine, the combination a of stltchlng mechanlsm comprlsmg a needle bar carrying a pair of needles, loop'er mechanism cooperating with the needles, a single cross thread pick-up "finger cooperating with the needles and having its pivotal axis coincident with the axis of theneedle bar and movable in acircular path practically aroundthe path of the needles, and a cross thread gu'ide'disposed atone side of the needles and slightly to the rear of the plane thereof. 7 r

26. The con'rbination of a work support, a presser foot, a presser bar carrying said foot, a feeding mechanism, a needle bar,ra

pair of needles carried by said needle bar and arranged in a plane at right angles to the line of feed, a thread guide disposed at one side of the needles and slightly in the rear of the plane of the needles, and a thread hook carried independently of the presser bar and movable across the line of feed to engage a cross thread extending through said thread guide and back across the line of feed for forming a loop in the cross thread, said hook and thread guide being so disposed relatively to the needles as to position the loop in the cross thread for the entrance only of the needle farthest removed from the thread guide.

Signed at 1822 Park Row Building, New

York city, New York, this 19th day of July, 1918.

JOHN P. WEIS. 

